To support theoretical research, we conduct several important experiments. The goal to these experiments is to show the sufficiency and necessity of Theorem REF  on practical examples. We used the Quadriga simulator [1]} to create channel matrices. We draw all figures depending on average user Single-User (SU) SINR (db). Firstly, we study interference cancellation property of the QR-MLD and MMSE-IRC detection matrices and Zero-Foring (ZF) precoding matrix in Fig. REF . This figure plainly demonstrates interference cancellation for precoding of Reduced Channel Zero-Forcing (RCZF) class (). It shows the ratio between Single-User (SU) and Multi-User (MU) Spectral Efficiency. And therefore, by definition, when this ratio approaches unity, interference between users is canceled. The successful inter-user interference cancellation using the proper precoding and detection matrices experimentally proves the sufficiency of Theorem REF .
